//
//  UserAccount.swift
//  Weibo
//
//  Created by 付启刚 on 15/12/15.
//  Copyright © 2015年 faq. All rights reserved.
//

import UIKit

class UserAccount: NSObject,NSCoding {
    var access_token:String?
    var expires_in: NSTimeInterval = 0 {
        didSet{
        //当过期时间一旦被设置的时候  就立即设置expires_date
            expires_date=NSDate(timeIntervalSinceNow: expires_in)
        }
    }
    var expires_date: NSDate?
    var uid:String?
    var avatar_large:String?
    var name:String?
    init(dict:[String : AnyObject]) {
        super.init()
        setValuesForKeysWithDictionary(dict)
    }
    override func setValue(value: AnyObject?, forUndefinedKey key: String) {}
  override var description:String {
let keys = ["access_token","expires_in","uid","name","avatar_large","expires_date"]
    return dictionaryWithValuesForKeys(keys).description
    }
    func saveAccount(){
    let path=(NSSearchPathForDirectoriesInDomains(.DocumentDirectory, .UserDomainMask, true).last! as NSString).stringByAppendingPathComponent("account.plist")
        //print(path)
        //保存自定义对象
        NSKeyedArchiver.archiveRootObject(self, toFile: path)
    }
    //class func  表示的是类方法
    class  func loadAccount()->UserAccount? {
        let path=(NSSearchPathForDirectoriesInDomains(.DocumentDirectory, .UserDomainMask, true).last! as NSString).stringByAppendingPathComponent("account.plist")
        if let account = NSKeyedUnarchiver.unarchiveObjectWithFile(path) as? UserAccount {
            //对token的有效期需要做判断 如果过期 返回nil
            if account.expires_date?.compare(NSDate()) == NSComparisonResult.OrderedDescending {
                return account
            }
        }
       return nil
    }
    //解档
 required init?(coder aDecoder: NSCoder) {
    access_token = aDecoder.decodeObjectForKey("access_token") as? String
    //如果基本数据类型 就可以直接获取到具体类型的熟悉 不需要类型转换
    expires_in = aDecoder.decodeDoubleForKey("expires_in")
    uid = aDecoder.decodeObjectForKey("uid") as? String
    avatar_large = aDecoder.decodeObjectForKey("avatar_large") as? String
    name = aDecoder.decodeObjectForKey("name") as? String
    expires_date = aDecoder.decodeObjectForKey("expires_date") as? NSDate
    }
    //归档
    func encodeWithCoder(aCoder: NSCoder) {
        aCoder.encodeObject(access_token, forKey: "access_token")
        aCoder.encodeDouble(expires_in, forKey: "expires_in")
        aCoder.encodeObject(uid, forKey: "uid")
        aCoder.encodeObject(avatar_large, forKey: "avatar_large")
        aCoder.encodeObject(name, forKey: "name")
        aCoder.encodeObject(expires_date, forKey: "expires_date")
    }
}
